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Growth on plant

BAxolotl

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Hey I was wondering if anyone knows what this black growth/algae is on one of the plants in my tank. The tank currently houses an axolotl and is ~16°C pH 7.8 with relatively hard water. There is a 2' grow light on a timer situated above the tank as well
 

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Chinadog

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It looks like an algal or bacterial bloom. It's nothing to worry about, they are relatively common, especially in recently set up tanks. They can spread very quickly sometimes, but almost always burn themselves out once the excess nutrients in the water are all used up.
 

MnGuy

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Yeah, looks like algae. The fish guy in me says take out the plants with the algae before it spreads! And consider dialing back the number of hours your light is on.

How long is the light on? Do you have a lot of plants?
 
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